pwm: rockchip-test: Add demo for updating both period and duty in wave generator mode

The demo wave should be like:

    _   _   _   _   _
   | | | | | | | | | |
 __| |_| |_| |_| |_| |_____________________________________

 |                   |                                    |
 |  five 400K waves  |             delay 10ms             |
 |                   |                                    |

Change-Id: I89c1d921dd2b230debe2664036b20c1d305cd35f
Signed-off-by: Damon Ding <[email protected]>

Author: Damon Ding

drivers/pwm/pwm-rockchip-test.c

@@ -18,10 +18,11 @@
 #define PWM_CONTROLLER_NUM_MAX	4
 #define PWM_CHANNEL_NUM_MAX	8
 
-#define PWM_WAVE_8BIT_TEST 1
+#define PWM_WAVE_BREATHING_LIGHT_8BIT_TEST 1
 
 /* 400k pwm_dclk src */
-#ifdef PWM_WAVE_8BIT_TEST
+#ifndef PWM_WAVE_PRIOD_DUTY_BOTH_UPDATE_TEST
+#ifdef PWM_WAVE_BREATHING_LIGHT_8BIT_TEST
 #define PWM_TABLE_MAX		256
 #define PWM_WIDTH_MODE		PWM_WAVE_TABLE_8BITS_WIDTH
 /* in nanoseconds */
@@ -34,6 +35,7 @@
 #define PWM_WAVE_STEP		10000
 #define PWM_WAVE_RPT		10
 #endif
+#endif
 
 struct pwm_test_data {
 	struct pwm_device *pwm_dev;
@@ -156,8 +158,12 @@ static void pwm_rockchip_test_help_info(void)
 	pr_info("\n");
 	pr_info("wave generator demo:\n");
 	pr_info("echo wave 0 1 true > /dev/pwm_rockchip_misc_test\n");
+	pr_info("[brathing light demo with 8bit table]\n");
 	pr_info("echo continuous 0 1 640000 320000 normal > /dev/pwm_rockchip_misc_test\n");
+	pr_info("[brathing light demo with 16bit table]\n");
 	pr_info("echo continuous 0 1 1000000 500000 normal > /dev/pwm_rockchip_misc_test\n");
+	pr_info("[demo for updating both period and duty]\n");
+	pr_info("echo continuous 0 1 1000 500 normal > /dev/pwm_rockchip_misc_test\n");
 	pr_info("echo enable 0 1 true > /dev/pwm_rockchip_misc_test\n");
 	pr_info("------------------------------------------------------------------------------------\n");
 }
@@ -200,7 +206,7 @@ static ssize_t pwm_rockchip_test_write(struct file *file, const char __user *buf
 	struct pwm_device *pdev;
 	struct pwm_state state;
 	struct pwm_capture cap_res;
-	struct rockchip_pwm_wave_table duty_table;
+	struct rockchip_pwm_wave_table wave_table;
 	struct rockchip_pwm_wave_config wave_config;
 	struct rockchip_pwm_biphasic_config biphasic_config;
 	enum rockchip_pwm_freq_meter_input_sel freq_input_sel;
@@ -627,14 +633,59 @@ static ssize_t pwm_rockchip_test_write(struct file *file, const char __user *buf
 			goto exit;
 		}
 
+#ifdef PWM_WAVE_PRIOD_DUTY_BOTH_UPDATE_TEST
+		/*
+		 * The output wave should be like:
+		 *    _   _   _   _   _
+		 *   | | | | | | | | | |
+		 * __| |_| |_| |_| |_| |_____________________________________
+		 *
+		 * |                   |                                    |
+		 * |  five 400K waves  |             delay 10ms             |
+		 * |                   |                                    |
+		 */
+		table[0] = 2500;
+		table[1] = 500000; // avoid exceeding the 16-bit table
+		table[2] = 500000;
+		table[3] = 500000;
+		table[4] = 500000;
+		table[5] = 1250;
+		table[6] = 0;
+		table[7] = 0;
+		table[8] = 0;
+		table[9] = 0;
+
+		wave_table.table = table;
+		wave_table.offset = 0;
+		wave_table.len = 10;
+
+		wave_config.wave_table = &wave_table;
+		wave_config.clk_src = PWM_SELECT_CLK_PWM;
+		wave_config.mem_clk_src = PWM_SELECT_CLK_PWM_OSC;
+		wave_config.width_mode = PWM_WAVE_TABLE_16BITS_WIDTH;
+		wave_config.update_mode = PWM_WAVE_INCREASING;
+		wave_config.enable = enable;
+		wave_config.duty_en = true;
+		wave_config.period_en = true;
+		wave_config.clk_rate = 100000000;
+		wave_config.rpt = 4;
+		wave_config.duty_max = 9;
+		wave_config.duty_min = 5;
+		wave_config.period_max = 4;
+		wave_config.period_min = 0;
+		wave_config.offset = 0;
+		wave_config.middle = 0;
+		wave_config.max_hold = 0;
+		wave_config.min_hold = 0;
+		wave_config.middle_hold = 0;
+#else
 		for (i = 0; i < PWM_TABLE_MAX; i++)
 			table[i] = i * PWM_WAVE_STEP;
-		duty_table.table = table;
-		duty_table.offset = (channel_id % 3) * PWM_TABLE_MAX;
-		duty_table.len = PWM_TABLE_MAX;
+		wave_table.table = table;
+		wave_table.offset = (channel_id % 3) * PWM_TABLE_MAX;
+		wave_table.len = PWM_TABLE_MAX;
 
-		wave_config.duty_table = &duty_table;
-		wave_config.period_table = NULL;
+		wave_config.wave_table = &wave_table;
 		wave_config.clk_src = PWM_SELECT_CLK_PWM;
 		wave_config.mem_clk_src = PWM_SELECT_CLK_PWM_OSC;
 		wave_config.width_mode = PWM_WIDTH_MODE;
@@ -653,6 +704,7 @@ static ssize_t pwm_rockchip_test_write(struct file *file, const char __user *buf
 		wave_config.max_hold = 3;
 		wave_config.min_hold = 0;
 		wave_config.middle_hold = 2;
+#endif
 
 		ret = rockchip_pwm_set_wave(pdev, &wave_config);
 		if (ret) {
@@ -662,8 +714,10 @@ static ssize_t pwm_rockchip_test_write(struct file *file, const char __user *buf
 			goto exit;
 		}
 
+#ifndef PWM_WAVE_PRIOD_DUTY_BOTH_UPDATE_TEST
 		pr_info("%s %s mode for pwm%d_%d: table_len = %d, table_step = %d\n",
 			argv[2], cmd, controller_id, channel_id, PWM_TABLE_MAX, PWM_WAVE_STEP);
+#endif
 		break;
 	case PWM_GLOBAL_CTRL:
 		if (!argv[0]) {